After watching some more of Darchinyan,I'm sure Arce could beat him. Darchinyan has never faced someone as skilled as Arce,he loads up waaaaaay too much which is how he gets his power,Arce should be able to see the punch coming,he's wiiiide open and looks uncomfortable when someone goes to his body. Arce is far superior in technique and skill,he just needs to be wary of the power.